Which of the following is the percentage equivalent of 0.0016? A. 16%
B. 160%
C. 1.6%
D. 0.16% - D. To derive a percentage from a decimal, multiply by
... [Show More] 100: 0.0016(100) = 0.16%
Curtis is taking a road trip through Germany, where all distance signs are in metric. He passes a sign that states the city of Dusseldorf is 45 kilometers away. Approximately how far is this in miles?
A. 42 miles
B. 37 miles
C. 28 miles
D. 16 miles - C. one kilometer is about 0.62 miles, 45(0.62) = 27.9
approximately 28 miles
On a floor plan drawn at a scale of 1:100, the area of a rectangular room is 30 cm2. What is the actual area of the room?
A. 30,000 cm2
B. 300 m2
C. 3,000 m2
D. 30 m2 - D. Since there are 100 cm in a meter, on a 1:100 scale drawing, each centimeter represents one meter. Therefore, an area of one square centimeter on the drawing represents one square meter tin actuality.
- Since the area of the room in the scale drawing is 30 cm2, the room's actual area is 30 m2.
L/100 x W/100 = 30 cm2
lw/100 = 30 cm2 Area = 300,000 cm2
300,000 cm2 x. 1m/100 cm x 1m/100 cm = 30m2
Mandy can buy 4 containers of yogurt and 3 boxes of crackers for $9.55. She can buy 2 containers of yogurt and 2 boxes of crackers for $5.90. How much does one box of crackers cost?
A. $1.75 B. $2.00 C. $2.25
D. $2.50 - C.
The situation may be modeled by the system: 4x + 3y = 9.55
2x + 2y = 5.90
Multiplying the bottom equation by - 2 gives:
4x + 3y = 9.55
-4x - 4y = -11.80
Addition of the two equations gives - y = -2.25 or y = 2.25. Thus, one box of crackers costs
$2.25
9.55-11.80 = -2.25
-y = -2.25
-y/-1 = -2.25/-1
y = 2.25
1.
THE NEXT TWO QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Pernell's scores on her last five chemistry exams were 81, 92, 87, 89, and 94.
What is the approximate average of her scores? A. 81
B. 84
C. 89
D. 91 - C. To find the average of Pernell's scores, add them up and then divide by the number of scores (5 in this case). In other words,
81 + 92 + 87 + 89 + 94 = 443
443/5 = 89
2.
THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Pernell's scores on her last five chemistry exams were 81, 92, 87, 89, and 94. [Show Less]